OpenCVBridge Compile error ITK 5.1RC1

[AzHicham]

Description

I managed to compile ITK 5.1RC1 with OpenCV Bridge, after some corrections (already fixed on master or ongoing).
Everything works pretty well, except when I use OpenCVImageBridge function.

I have the folowing error :
C:\Program Files\ITK\Release\include\ITK-5.1\itkOpenCVImageBridge.hxx(98): error C2440: 'initializing': cannot convert from 'const cv::Mat' to 'const IplImage'

I fixed this error using

const IplImage converted = cvIplImage(in);
instead of 
const IplImage converted = in;

on line 98 (itkOpenCVImageBridge.hxx)

Versions

OpenCV 4.2
ITK 5.1RC1

Environment

Windows 10 x64
MSVC 2019 16.4

Additional Information

[dzenanz]

Is this issue still open? #1650 might have touched it.

[Giaco90]

@Hicham-Damae solution worked for ITK 5.0.1 and OpenCV 4.2.0 too.

[dzenanz]

Can either of you turn it into a PR?

[PierreWargnier]

Hi, I was having the same error with ITK 5.2.0 and OpenCV 4.3.0 (latest stable version of both). The solution proposed by @Hicham-Damae works for me too. This is due to the fact that IplImage has been deprecated in OpenCV for quite a long time now. It was eventually removed in version 4.0.0 and only remains in the C API. The fix works because it is explicitely invoking the C API. This however, is only a temporary fix because the OpenCV C API is likely to be completely removed in future versions (it is already absent from the documentation as of version 4.3.0 - see https://docs.opencv.org/4.3.0/ - although it appears to be still accessible).